Merrychef 402s - Manual (Page 20)

402s Ovens Pt. No. 32Z3522 Issue 6
20
Please Note
DO NOT attempt to carry out the
following procedure unless you have
the following tools.
Tools required for microwave leakage test
1.0 Pint ( 600ml) glass beaker
Supply of cold water
Microwave leakage meter
Warning
Check for radiation emission after servicing. Should the emission be more than 4mW/cm² Inform
Merrychef service centre immediately. After repairing or replacing any radiation safety device,
keep a written record for future reference, as required by D.H.H.S. and Health and Welfare
Canada regulation.
This requirement must be strictly observed. In addition, the emission reading must be recorded
on the service repair documentation while in the customer’s premises.
Read and understand all of these notes and procedure before carrying out this operation.
Note before measuring.
• Make sure that the survey meter you are using has been calibrated and is suitable for
measuring frequencies of 2,450 MHz.
• Do not exceed meter full scale deflection, leakage meter should initially be set to the highest
scale, then adjusted down as necessary to ensure that low readings are measured on the most
sensitive range.
• To prevent false readings, hold the probe on the grip provided and move along the areas
indicated on the following page.
The probe should be moved at 1 inch/second (2.5cm/second)).
• With any casework removed the leakage should not exceed 4mW/cm².
• When measuring the leakage, always hold the probe at 2inches (50mm) from the test area
using the probe supplied with the instrument.
• Always hold the probe at right angles to the oven and point of measurement
PROCEDURE FOR MICROWAVE EMISSION TEST (1)
Manual Mode
If the manual mode
screen does not
appear it must be
changed in the
OVEN PROFILE see
Appendix 6 Procedure:
1. Place 0.5 pint (275ml) of cold water in the 1.0 Pint ( 600ml ) glass
beaker.
2. Place the 1.0 Pint ( 600ml ) glass beaker in the centre of oven.
3. Set the leakage meter to the appropriate scale/range.
4. Set a time of 30 seconds with Fan speed at 10% and Power at 100%.
5. Press Start and move the survey meter probe along the areas
indicated on page 21. Open the door at 30 seconds and taking care
change the water. If the water boils the meter readings will be
inaccurate.
On completing the test remember to return the Oven Profile and
PREHEAT temperature to the original settings.
Changing the Oven Profile
In order to carry out the test the oven PREHEAT
must be set to OFF[ V3.0 ] or 0ºF[ V2.0 ] to switch
off the convection heaters and the Manual
controls must be set to ON [ V3.0 ] or PROGRAM/
MANUAL[ V2.0 ].
When the test is completed the oven must be
returned to its original settings or the appropriate
MenuKey can be used to reset the oven
automatically.
See Appendix 6 for changing the Oven Profile